A method for maintaining MBS session when UE performs intersystem change is provided. UE maintains a PDU session in 5G network. UE then joins an MBS session for receiving MBS service over the associated PDU session. Later on, UE performs intersystem change from 5G to 2/3/4G. The PDU session is then released or transferred to a PDN connection. From UE perspective, UE determines that the released or transferred PDU session is associated with the MBS session, and therefore locally leaves the MBS session. From NW perspective, NW determines that the released or transferred PDU session is associated with the MBS session, and therefore considers the UE is removed from the MBS session.

Methods and apparatus for providing quasi-licensed spectrum access within an area or venue. In one embodiment, the quasi-licensed spectrum utilizes 3.5 GHz CBRS (Citizens Broadband Radio Service) spectrum allocated by a Federal or commercial SAS (Spectrum Access System) to a managed content delivery network that includes one or more wireless access nodes (e.g., CBSDs and APs) in data communication with a controller. In one variant, the controller dynamically allocates (i) spectrum within the area or venue within CBRS bands, and (ii) MSO users or subscribers to CBRS bands or WLAN (e.g., public ISM) bands in to manage interference between the coexisting networks, and maximize user experience. In another variant, the controller cooperates with a provisioning server to implement a client device application program or app on MSO user or subscriber client devices which enables inter-RAT access.

A terminal control method comprises: when a first base station receives a service request of a predetermined service sent by a terminal, sending a pre-handover request carrying a predetermined service identifier to the second base station, such that the second base station returns pre-handover success information, wherein the second base station stores first base station configuration information; when the first base station receives the pre-handover success information, sending a handover command to the terminal such that the terminal accesses the second base station and sends terminal capability information; when the first base station does not support the predetermined service and the terminal does not support the predetermined service in a communication system to which the first base station belongs, the second base station controls the terminal to always access the second base station according to the predetermined service identifier, the first base station configuration information and the terminal capability information.

A communication device for handling mobility between a new radio (NR)/fifth generation (5G) network and a long-term evolution (LTE) network comprises a storage device for storing instructions and a processing circuit coupled to the storage device. The processing circuit is configured to execute the instructions stored in the storage device. The instructions comprise connecting to the NR/5G network; communicating a Protocol Data Unit (PDU) Session identity/identifier (ID) identifying a PDU Session with the NR/5G network; communicating data of the PDU Session with the NR/5G network; disconnecting the NR/5G network, connect to the LTE network and performing a tracking area update (TAU) procedure with the LTE network; disconnecting the LTE network and connect to the NR/5G network, after performing the TAU procedure; and communicating the PDU Session ID identifying the PDU Session with the NR/5G network, when disconnecting the LTE network and connecting to the NR/5G network.

Embodiments of this application provide a network handover method and a related device. The method includes: when receiving a user terminal handover request that is sent by a source radio access network node and that carries a target base station identifier, determining, by a source mobility management function entity based on the target base station identifier, to trigger inter-RAT network handover; sending a first message to a source session management function entity; receiving a second message sent by the source session management function entity, where the second message includes a session management context; and sending a relocation request to a target mobility management function entity, where the relocation request is used to instruct the target mobility management function entity to perform inter-RAT network handover on the user terminal. In this way, data continuity in an inter-RAT network handover process is ensured.

The present disclosure relates to user equipment (20) mobility between a first radio access network (11) arranged to operate according to a first radio access technology and a second radio access network (12) arranged to operate according to a second radio access technology. A user equipment (20) connected to the first radio access network (11) retrieves information associated with an anonymized temporary identifier assigned to the user equipment (20) by a radio access node (30) in the first radio access network (11), stores the information in the user equipment (20) and presents the temporary identifier to a radio access point (40) of the second radio access network, when seeking to connect.

The present application relates to a method for operating a terminal device (17) in a cellular mobile communication network (10). The cellular mobile communication network (10) comprises a first base station (11) using a first radio resource, and a second base station (12, 13) using a second radio resource. The terminal device (17) comprises a first transceiver unit (25) for communicating via the first radio resource and a second transceiver unit (26) for communicating via the second radio resource. According to the method, a radio resource control information for the second radio resource is determined and received at the terminal device (17) via the first transceiver unit (25). As defined by the radio resource control information, user data communication (19) between the second base station (12) enter the terminal device (17) is established via the second transceiver unit (26). The first transceiver unit (25) is set in an idle mode.

A session establishment method and an apparatus, such that an established packet data network (PDN) connection is transferred to a network slice in a fifth generation (5G) network during inter-system mobility of a terminal. The method includes receiving, by a terminal from a control plane function entity, corresponding network slice information used for transferring an established PDN connection to a 5G network, where the corresponding network slice information includes corresponding single network slice selection assistance information (S-NSSAI). The method further includes sending a packet data unit (PDU) session establishment request, where the PDU session establishment request includes corresponding S-NSSAI used for transferring a first PDN connection to the 5G network and a corresponding data network name (DNN) used for transferring the first PDN connection to the 5G network, and the first PDN connection is any one of one or more established PDN connections.

Systems, methods, and computer-readable media are described for delivering wireless telecommunications services using the Voice over Long Term Evolution (VoLTE) protocol, the Video over Long Term Evolution (VoLTE) protocol, and other such protocols that implement the Real-Time Transport Protocol (RTP) to deliver packet flows to mobile devices. Metrics relating to the RTP packet flow may be generated, and may be collected from a mobile device periodically or on an as-needed basis. The RTP-based metrics may be utilized to determine that an LTE inter-frequency handover should be performed. Inter-frequency handover criteria may specify thresholds for RTP metrics within an individual reporting period, or may be used to determine that an inter-frequency handover will occur if a rolling or weighted average of RTP metrics satisfies a threshold.

A system described herein improves user equipment (UE) access to call and data services provided by a network carrier by updating settings on the UE based device data from the UE. The updates may modify the UE hardware configuration, including activating or deactivating different network radios of the UE, enable or disable different call or data services accessed through the different network radios, and/or modify parameters controlling UE network selection and switching (e.g., handoff). In doing so, the system may improve the user experience when accessing wireless services of the network carrier and resolve quality issues whether due to poor signal strength, congested networks, or excessive network switching.